I am a user too. I collect users, and I use all of my knives. I will use my TNT when I get it.
I would rather buy and use an $800 knife and then lose it rather than have never got to own it at all. I enjoy use high-end knives. I do not fear using them because much of the reason they costs so much is because they are such great users, and so damn hard to break.
I agree with you about "art knives". I am not into knives purely as display pieces. But what some might consider too pretty to use, and thus a pure display knife, I might beat the hell out of. What you may consider an art knife, I might consider a very pretty beater.
The more I paid for it, the more I will use it and the harder I will use it.
It is the cheapo knives that I don't want to use as often, and feel like I have to baby. They are the ones that are less fun to use and in greater danger of breaking.
I would rather spend more on a knife than on a gun because a knife is the most useful tool- Period. A gun is pretty much useless to me and no where near as worthy as a knife.